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Improving the accuracy of selection for late maturity -amylase in wheat using multi-phase designs

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Butler, D. G., Tan, M. K. and Cullis, B. R. (2009) Improving the accuracy of selection for late maturity -amylase in wheat using multi-phase designs. Crop and Pasture Science, 60 (12). pp. 1202-1208.


Article Link: https://doi.org/10.1071/CP09124

Publisher URL: https://www.publish.csiro.au/paper/CP09124


The assessment of grain defect traits is assuming greater importance in wheat germplasm selection. Late maturity α-amylase is one such characteristic that renders wheat unsuitable for high value end products, even though the grain may appear sound. Phenotyping defect traits typically involves a multi-phase process, where genetic material for assay has been affected by non-genetic sources of variation in one or more previous linked stages of experimentation or preparation. The adoption of appropriate statistical design and analysis methods in these situations is, however, not widespread. Substantial sources of non-genetic variation were identified in the analysis of a designed experiment to measure late maturity α-amylase expression, indicating the potential for improved selection decisions. A simulation study based on these results suggests that significant gains over current methods in the accuracy of phenotyping this grain defect can be achieved with sound multi-phase statistical design and analysis techniques. Although restricted in scope, the simulation also indicates that a considerable increase in estimated heritability could be expected from the proposed methodology.

Item Type:Article
Business groups:Crop and Food Science
Additional Information:Reproduced with permission from © CSIRO Publishing. Access to published version is available via Publisher’s website.
Subjects:Science > Botany > Genetics
Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Plant culture > Field crops > Wheat
Live Archive:03 Feb 2022 02:21
Last Modified:03 Feb 2022 02:21

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